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SOLIS Vector Spectromagnetograph: status and science
C. J. Henney, C. U. Keller, J. W. Harvey +5
The Vector Spectromagnetograph (VSM) instrument has been recording photospheric and chromospheric magnetograms daily since August 2003. Full-disk photospheric vector magnetograms a…
Magnetic Complexity in Eruptive Solar Active Regions and Associated Eruption Parameters
M. K. Georgoulis
Using an efficient magnetic complexity index in the active-region solar photosphere, we quantify the preflare strength of the photospheric magnetic polarity inversion lines in 23 e…
Automatic Active-Region Identification and Azimuth Disambiguation of the SOLIS/VSM Full-Disk Vector Magnetograms
M. K. Georgoulis, N. -E. Raouafi, C. J Henney
The Vector Spectromagnetograph (VSM) of the NSO's Synoptic Optical Long-Term Investigations of the Sun (SOLIS) facility is now operational and obtains the first-ever vector magneti…
Magnetic Energy and Helicity Budgets in the Active-Region Solar Corona. I. Linear Force-Free Approximation
M. K. Georgoulis, Barry J. LaBonte
We self-consistently derive the magnetic energy and relative magnetic helicity budgets of a three-dimensional linear force-free magnetic structure rooted in a lower boundary plane.…